求全微分z=sin^2x cos^2yz=sin^2x +cos^2y
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求全微分z=sin^2x cos^2yz=sin^2x +cos^2y
求全微分z=sin^2x cos^2y
z=sin^2x +cos^2y
求全微分z=sin^2x cos^2yz=sin^2x +cos^2y
z=sin²x+cos²y
az/ax=2sinx*cosx=sin2x
az/ay=2cosy*(-siny)=-sin2y
∴dz=sin2xdx-sin2ydy
dy=2sinxcosx*dx-2cosysiny*dy为所求
求全微分z=sin^2x cos^2yz=sin^2x +cos^2y
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